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canvas prints scanning electron micrograph canvas prints scanning electron microscopy canvas prints sem canvas prints microscopy canvas prints micrograph canvas prints red blood cell canvas prints erythrocyte canvas prints circulatory system canvas prints white blood cell canvas prints platelet canvas prints leukocyte canvas prints thrombocyte canvas prints lymphocyte canvas prints monocyte canvas prints neutrophil canvas prints

photographs scanning electron micrograph photos scanning electron microscopy photos sem photos microscopy photos micrograph photos red blood cell photos erythrocyte photos circulatory system photos white blood cell photos platelet photos leukocyte photos thrombocyte photos lymphocyte photos monocyte photos neutrophil photos

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Scanning electron micrograph (SEM) of normal circulating human blood. One can see red blood cells, several white blood cells (including lymphocytes, a monocyte, a neutrophil, and many small disc-shaped platelets. Blood circulates through the heart, arteries, capillaries, and veins. It is composed of red blood cells (erythrocytes), white blood cells (leukocytes), and platelets (thrombocytes) suspended in plasma, which is a straw-colored fluid composed of proteins, water, and salts. Erythrocytes are made in the bone marrow. Mature red blood cells are non-nucleated. In place of a nucleus, they contain hemoglobin. The iron in hemoglobin is an important protein which allows the cell to carry oxygen to other parts of the body. Erythrocytes also carry away carbon dioxide from the body cells to the lungs where it is expelled through the process of breathing. The infection-fighting leukocytes are classified in two main groups granular and agranular. Granulocytes are formed in bone marrow, and i...